Dataset Overview | National Centers for Environmental Information (NCEI)

Dissolved inorganic carbon, total alkalinity, water temperature and salinity from laboratory analyzed discrete water samples taken at the Central Gulf of Mexico Ocean Observing System buoy moored at 28.9N, 90.5W off Coastal Louisiana from 2017-07-14 to 2022-02-20 (NCEI Accession 0279824)

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This dataset consists of Dissolved inorganic carbon, total alkalinity, water temperature and salinity from laboratory analyzed discrete water samples taken at the Central Gulf of Mexico Ocean Observing System buoy moored at 28.9N, 90.5W off Coastal Louisiana from 2017-07-14 to 2022-02-20. These are validation samples for the NOAA/PMEL MAPCO2 system buoy CoastalLA_91W_30N, that includes SeaBird CTD and SAMI pH instruments (https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0209137.html).

Dataset Citation

Cite as: Hayes, Christopher T.; Howden, Stephan D. (2023). Dissolved inorganic carbon, total alkalinity, water temperature and salinity from laboratory analyzed discrete water samples taken at the Central Gulf of Mexico Ocean Observing System buoy moored at 28.9N, 90.5W off Coastal Louisiana from 2017-07-14 to 2022-02-20 (NCEI Accession 0279824). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/hk16-5q40. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0279824

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Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2017-07-14 to 2022-02-20
Spatial Bounding Box Coordinates	West: -90.504 East: -90.496 South: 28.896 North: 28.904
Spatial Coverage Map

General Documentation

Project Metadata
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Descriptive Information
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Associated Resources

Coastal Louisiana Buoy (CoastalLA_91W_30N)
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Moorings/Coastal_LA.html
  related resource
NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
- https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
  OCADS website

Publication Dates	publication: 2023-07-11
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Supplemental Information	This dataset is associated with the following and cruise ID(s): N/A. This data package (Submission ID: BF6778NW1) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL.
Purpose	Validation on measurements from moored instrumentation.
Use Limitations	accessLevel: Public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.

Dataset Citation	Cite as: Hayes, Christopher T.; Howden, Stephan D. (2023). Dissolved inorganic carbon, total alkalinity, water temperature and salinity from laboratory analyzed discrete water samples taken at the Central Gulf of Mexico Ocean Observing System buoy moored at 28.9N, 90.5W off Coastal Louisiana from 2017-07-14 to 2022-02-20 (NCEI Accession 0279824). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/hk16-5q40. Accessed [date].
Cited Authors	Hayes, Christopher T. The University of Southern Mississippi Howden, Stephan D. The University of Southern Mississippi
Principal Investigators	Christopher T. Hayes The University of Southern Mississippi (USM)
Contributors	The University of Southern Mississippi (USM)
Resource Providers	Stephan D. Howden University of Southern Mississippi, Department of Marine Science The University of Southern Mississippi (USM)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Information: NOAA (ontinued Development of the Gulf of Mexico Coastal Ocean Observing system, NA18NOS0120018) Funding Information: NOAA (Continued Development of the Gulf of Mexico Coastal Ocean Observing System, NA21NOS0120092)

Theme keywords	NODC DATA TYPES THESAURUS DISSOLVED INORGANIC CARBON (DIC) SALINITY total alkalinity WATER TEMPERATURE NODC OBSERVATION TYPES THESAURUS chemical discrete sample physical profile WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Discrete measurement Profile Provider Variable Abbreviations DIC SST Salinity TA
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS The University of Southern Mississippi NODC SUBMITTING INSTITUTION NAMES THESAURUS The University of Southern Mississippi
Platform keywords	NODC PLATFORM NAMES THESAURUS R/V Acadiana Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes ACADIANA (call sign: WDG3928, ICES code: 33SZ, 1985)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS bottle carbon dioxide (CO2) gas analyzer salinometer temperature sensor titrator Global Change Master Directory (GCMD) Instrument Keywords CO2 ANALYZERS > CO2 ANALYZERS SALINOMETERS TEMPERATURE SENSORS > TEMPERATURE SENSORS
Place keywords	NODC SEA AREA NAMES THESAURUS Gulf of Mexico Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO Provider Geographic Names Gulf of Mexico
Project keywords	NODC PROJECT NAMES THESAURUS US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) Cruise ID NA EXPOCODE NA Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID NA Research Projects CenGOOS OA
Keywords	NCEI ACCESSION NUMBER 0279824

Use Constraints	Cite as: Hayes, Christopher T.; Howden, Stephan D. (2023). Dissolved inorganic carbon, total alkalinity, water temperature and salinity from laboratory analyzed discrete water samples taken at the Central Gulf of Mexico Ocean Observing System buoy moored at 28.9N, 90.5W off Coastal Louisiana from 2017-07-14 to 2022-02-20 (NCEI Accession 0279824). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/hk16-5q40. Accessed [date].
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2023-07-11T10:42:36Z - NCEI Accession 0279824 v1.1 was published.
Output Datasets	NCEI Accession 0279824 v1.1 NCEI Accession 0279824 v1.1 (download) published 2023-07-11T10:42:36Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: micro-mole/kilogram; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Standard Niskin; Analyzing instrument: Discrete dissolved inorganic carbon (DIC) measurement (Coulomerter); Detailed sampling and analyzing information: A glass 250 mL wide-mouth Pyrex bottle was triple rinsed with sample water and then filled smoothly and overfilled with half a sample bottle volume. Following collection, the headspace was adjusted by removing seawater so that 1% of the bottle volume was left to allow for water expansion (i.e., 2.5 mL headspace for a 250 mL bottle). The samples were amended with 50 μl of 50% saturated reagent grade HgCl2 solution, capped tight with o-ring seal, stored in a cooler for transportation and then in a refrigerator until analysis (usually within 3-5 days). Samples were analyzed for inorganic carbon using methods from Dickson et al. (2007) by acidifying 30 mL of sample with 4 mL of 2 M phosphoric acid and measuring the extracted CO2 on a UIC Coulometer. Samples were brought to 24°C using a water jacket before DIC analysis. A handheld syringe was used to extract water from the sample bottle with tygon tubing, the sample was accurately weighed for mass and then injected with a metal needle through a rubber septa into the UIC acidification unit linked to the Coulometer. In-house sodium carbonate/sodium chloride solutions were used for standard checks on daily basis (i.e., for each daily run). DIC Certified Reference Material solutions from Dickson/Scripps were used less frequently (6 months to annually depending on frequency of sample analysis) to determine/update the calibration factor for DIC concentrations. The standard deviations of multiple replicates of the CRM or daily standard were used to determine the reported uncertainty in DIC. Reported in this data report are also data from collaborating labs at the University of Delaware (Cai) and Texas A&M University-Corpus Christi (Hu). As our USM lab did not participate in a previous laboratory intercomparison, we sent replicate samples to our colleagues at these intercalibrated labs as a measure of our external reproducibility.; Replicate information: In general triplicate glass bottle samples were taken from the same Niskin bottle. The reported value is the average of triplicate analyses. In cases where we sent replicates to another lab for intercomparison, triplicate samples were also provided to the other lab.; Standardization description: The UIC Coulometer produces an absolute value of carbon analyzed, not requiring a standard curve. We used the apparent value measured on the Dickson CRM to calculate the "calibration factor", described by Dickson et al. (2007), to correct measured DIC values.; Standardization frequency: Daily; CRM manufacturer: Dickson/Scripps; CRM batch number: 183; Preservation method: HgCl2; Preservative volume: 50 μl of 50% saturated reagent grade HgCl2 solution added to 250 mL sample; Preservative correction: No preservative correction was made.; Uncertainty: 0.6%; Method reference: Dickson et al. 2007; Researcher name: Christopher Hayes; Researcher institution: University of Southern Mississippi. Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: micro-mole/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Alkalinity titrator; Type of titration: Gran; Cell type (open or closed): open; Detailed sampling and analyzing information: A glass 250 mL wide-mouth Pyrex bottle was triple rinsed with sample water and then filled smoothly and overfilled with half a sample bottle volume. Following collection, the headspace was adjusted by removing seawater so that 1% of the bottle volume was left to allow for water expansion (i.e., 2.5 mL headspace for a 250 mL bottle). The samples were amended with 50 μl of 50% saturated reagent grade HgCl2 solution, capped tight with o-ring seal, stored in a cooler for transportation and then in a refrigerator until analysis (usually within 3-5 days). Samples were analyzed for TA by Gran Titration (Gran 1952) on an Apollo SciTech, Newark, DE, Total Alkalinity Titrator AS-ALK2 on the day following DIC analysis. In-house sodium carbonate/sodium chloride solutions were used for standard checks on daily basis (i.e., for each daily run). TA Certified Reference Material solutions from Dickson/Scripps were used less frequently (6 months to annually depending on frequency of sample analysis) to check the acid concentration of the titrating acid and/or determine the volumetric systems were properly functioning. The standard deviations of multiple replicates of the CRM or daily standard were used to determine the reported uncertainty in Alkalinity. Gran function calculations to determine alkalinity from the titration are automated by the Apollo SciTech software. Reported in this data report are also data from collaborating labs at the University of Delaware (Cai) and Texas A&M University-Corpus Christi (Hu). As our USM lab did not participate in a previous laboratory intercomparison, we sent replicate samples to our colleagues at these intercalibrated labs as a measure of our external reproducibility.; Replicate information: In general triplicate glass bottle samples were taken from the same Niskin bottle. The reported value is the average of triplicate analyses. In cases where we sent replicates to another lab for intercomparison, triplicate samples were also provided to the other lab.; Standardization description: The AS-ALK2 titrator requires precise knowledge of the acid concentration of the hydrochloric acid/sodium chloride solution used for titration. We verified the concentration of our titration acid both by checking against in-house standard and the Dickson/Scripps solution. Additionally, we purchased a CRM acid from Dickson and analyzed the Dickson standard to verify the calibrationo of the system. Additionally, the volumetric based system required converting the alkalinity per volume to akalinity per mass using the density of the seawater sample based on the measured salinity and the 24 degree C temperature of the measured sample set by water jacket during measurement. The pH meter on the alkalintiy titrator was daily calibrated using standard Fisher buffer solutions.; Standardization frequency: Daily; CRM manufacturer: Dickson/Scripps; CRM batch number: 183; Preservation method: HgCl2; Preservative volume: 50 microliters of 50% saturated HgCl2 solution; Preservative correction: No preservative correction; TA blank correction: No blank correction; Uncertainty: 0.1%; Method reference: Gran (1952); Researcher name: Christopher Hayes; Researcher institution: University of Southern Mississippi. Parameter or Variable: Sea Surface Temperature; Abbreviation: SST; Unit: Deg. Cesius; Controlled vocabulary name: Sea Surface Temperature; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors. Parameter or Variable: Sea Surface Salinity; Abbreviation: Salinity; Controlled vocabulary name: Sea Surface Salinity; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors .

Lineage information for: dataset

Processing Steps

Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: micro-mole/kilogram; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Standard Niskin; Analyzing instrument: Discrete dissolved inorganic carbon (DIC) measurement (Coulomerter); Detailed sampling and analyzing information: A glass 250 mL wide-mouth Pyrex bottle was triple rinsed with sample water and then filled smoothly and overfilled with half a sample bottle volume. Following collection, the headspace was adjusted by removing seawater so that 1% of the bottle volume was left to allow for water expansion (i.e., 2.5 mL headspace for a 250 mL bottle). The samples were amended with 50 μl of 50% saturated reagent grade HgCl2 solution, capped tight with o-ring seal, stored in a cooler for transportation and then in a refrigerator until analysis (usually within 3-5 days). Samples were analyzed for inorganic carbon using methods from Dickson et al. (2007) by acidifying 30 mL of sample with 4 mL of 2 M phosphoric acid and measuring the extracted CO2 on a UIC Coulometer. Samples were brought to 24°C using a water jacket before DIC analysis. A handheld syringe was used to extract water from the sample bottle with tygon tubing, the sample was accurately weighed for mass and then injected with a metal needle through a rubber septa into the UIC acidification unit linked to the Coulometer. In-house sodium carbonate/sodium chloride solutions were used for standard checks on daily basis (i.e., for each daily run). DIC Certified Reference Material solutions from Dickson/Scripps were used less frequently (6 months to annually depending on frequency of sample analysis) to determine/update the calibration factor for DIC concentrations. The standard deviations of multiple replicates of the CRM or daily standard were used to determine the reported uncertainty in DIC. Reported in this data report are also data from collaborating labs at the University of Delaware (Cai) and Texas A&M University-Corpus Christi (Hu). As our USM lab did not participate in a previous laboratory intercomparison, we sent replicate samples to our colleagues at these intercalibrated labs as a measure of our external reproducibility.; Replicate information: In general triplicate glass bottle samples were taken from the same Niskin bottle. The reported value is the average of triplicate analyses. In cases where we sent replicates to another lab for intercomparison, triplicate samples were also provided to the other lab.; Standardization description: The UIC Coulometer produces an absolute value of carbon analyzed, not requiring a standard curve. We used the apparent value measured on the Dickson CRM to calculate the "calibration factor", described by Dickson et al. (2007), to correct measured DIC values.; Standardization frequency: Daily; CRM manufacturer: Dickson/Scripps; CRM batch number: 183; Preservation method: HgCl2; Preservative volume: 50 μl of 50% saturated reagent grade HgCl2 solution added to 250 mL sample; Preservative correction: No preservative correction was made.; Uncertainty: 0.6%; Method reference: Dickson et al. 2007; Researcher name: Christopher Hayes; Researcher institution: University of Southern Mississippi.
Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: micro-mole/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Alkalinity titrator; Type of titration: Gran; Cell type (open or closed): open; Detailed sampling and analyzing information: A glass 250 mL wide-mouth Pyrex bottle was triple rinsed with sample water and then filled smoothly and overfilled with half a sample bottle volume. Following collection, the headspace was adjusted by removing seawater so that 1% of the bottle volume was left to allow for water expansion (i.e., 2.5 mL headspace for a 250 mL bottle). The samples were amended with 50 μl of 50% saturated reagent grade HgCl2 solution, capped tight with o-ring seal, stored in a cooler for transportation and then in a refrigerator until analysis (usually within 3-5 days). Samples were analyzed for TA by Gran Titration (Gran 1952) on an Apollo SciTech, Newark, DE, Total Alkalinity Titrator AS-ALK2 on the day following DIC analysis. In-house sodium carbonate/sodium chloride solutions were used for standard checks on daily basis (i.e., for each daily run). TA Certified Reference Material solutions from Dickson/Scripps were used less frequently (6 months to annually depending on frequency of sample analysis) to check the acid concentration of the titrating acid and/or determine the volumetric systems were properly functioning. The standard deviations of multiple replicates of the CRM or daily standard were used to determine the reported uncertainty in Alkalinity. Gran function calculations to determine alkalinity from the titration are automated by the Apollo SciTech software. Reported in this data report are also data from collaborating labs at the University of Delaware (Cai) and Texas A&M University-Corpus Christi (Hu). As our USM lab did not participate in a previous laboratory intercomparison, we sent replicate samples to our colleagues at these intercalibrated labs as a measure of our external reproducibility.; Replicate information: In general triplicate glass bottle samples were taken from the same Niskin bottle. The reported value is the average of triplicate analyses. In cases where we sent replicates to another lab for intercomparison, triplicate samples were also provided to the other lab.; Standardization description: The AS-ALK2 titrator requires precise knowledge of the acid concentration of the hydrochloric acid/sodium chloride solution used for titration. We verified the concentration of our titration acid both by checking against in-house standard and the Dickson/Scripps solution. Additionally, we purchased a CRM acid from Dickson and analyzed the Dickson standard to verify the calibrationo of the system. Additionally, the volumetric based system required converting the alkalinity per volume to akalinity per mass using the density of the seawater sample based on the measured salinity and the 24 degree C temperature of the measured sample set by water jacket during measurement. The pH meter on the alkalintiy titrator was daily calibrated using standard Fisher buffer solutions.; Standardization frequency: Daily; CRM manufacturer: Dickson/Scripps; CRM batch number: 183; Preservation method: HgCl2; Preservative volume: 50 microliters of 50% saturated HgCl2 solution; Preservative correction: No preservative correction; TA blank correction: No blank correction; Uncertainty: 0.1%; Method reference: Gran (1952); Researcher name: Christopher Hayes; Researcher institution: University of Southern Mississippi.
Parameter or Variable: Sea Surface Temperature; Abbreviation: SST; Unit: Deg. Cesius; Controlled vocabulary name: Sea Surface Temperature; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors.
Parameter or Variable: Sea Surface Salinity; Abbreviation: Salinity; Controlled vocabulary name: Sea Surface Salinity; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ; Sampling instrument: water collection with pump; Analyzing instrument: Seabird sensors .

Acquisition Information (collection)
Instrument	bottle carbon dioxide (CO2) gas analyzer salinometer temperature sensor titrator
Platform	R/V Acadiana

Last Modified: 2024-06-10T13:28:32Z
For questions about the information on this page, please email: ncei.info@noaa.gov

Dissolved inorganic carbon, total alkalinity, water temperature and salinity from laboratory analyzed discrete water samples taken at the Central Gulf of Mexico Ocean Observing System buoy moored at 28.9N, 90.5W off Coastal Louisiana from 2017-07-14 to 2022-02-20 (NCEI Accession 0279824)

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